package com.zhm.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;

/**
 * Date： 2021/3/13 10:42
 *
 * @author ZHM
 */
@Service
public class PaymentService {

    @Value("${server.port}")
    private String serverPort;

    public String paymentInfo_OK(Integer id) {
        return "线程池:" + Thread.currentThread().getName() + " paymentInfo_OK, id:" + id;
    }

    // ====================================服务降级=================================================

    /**
     * 3 秒内表示正常 现像
     * 超出 3 秒就是一个 超时异常
     * <p>
     * fallbackMethod 表示出错之后，指定哪一个方法进行兜底
     */
    @HystrixCommand(fallbackMethod = "paymentInfoTimeoutHandler", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "5000")
    })
    public String paymentInfo_timeout(Integer id) {
        int timeNum = 3000;
        try {
            TimeUnit.MILLISECONDS.sleep(timeNum);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        // int i = 10/0;
        return "线程池:" + Thread.currentThread().getName() + " paymentInfo_timeout, id:" + id + " 耗时：" + timeNum;
    }

    public String paymentInfoTimeoutHandler(Integer id) {
        return "[兜底]线程池:" + Thread.currentThread().getName() + " 端口:" + serverPort + " 系统内部异常，系统超时, id:" + id;
    }

    //======================================================================================================

    //===============================================服务熔断=================================================
    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback", commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled", value = "true"), //是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"), // 请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds", value = "10000"), // 时间窗口期（单位，秒）
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage", value = "60"), // 失败率达到多少后跳闸
    }) // 在窗口期内，有10次请求以上 ，超过6次（60%）失败，就会开启断路

    public String paymentCircuitBreaker(@PathVariable("id") Integer id) {
        if (id < 0) {
            throw new RuntimeException("*******id不能负数");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName() + "\t" + "调用成功，流水号:" + serialNumber;

    }

    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id) {
        return "id不能负数，请稍后再试，/(ToT)/~~ id:" + id;
    }


}
